2001 Toyota RAV4 Owners Manual - Page 190

Checking the coolant level of the traction motor Carefully remove the radiator cap and check the inside of the radiator. If you cannot see the coolant, add ethylene- glycol type coolant for a proper corrosion protection of aluminum components. The coolant level in the reservoir will vary with the traction motor temperature. Check and add the coolant when the traction motor is cold. Always use ethylene-glycol type coolant for a proper corrosion protection of aluminum components. See information in the next column. If the coolant level drops within a short time after replenishing, there may be a leak in the system. Visually check the radiator, hoses, radiator cap and drain cock and water pump. If you can find no leak, have your EV service station test the cap pressure and check for leaks in the cooling system. Coolant type selection Use of improper coolants may damage your traction motor cooling system. Your coolant must contain ethylene-glycol type coolant for a proper corrosion protection of your traction motor that contains aluminum components. Use "TOYOTA Long Life Coolant" or equivalent. In addition to preventing freezing and subsequent damage to the traction motor, this type of coolant will also prevent corrosion. Further supplemental inhibitors or additives are neither needed nor recommended. Read the coolant container for information on freeze protection. Follow the manufacturer's directions for how much to mix with plain water (preferably demineralized water or distilled water). The total capacity of the cooling system is given in Section 9. We recommend to use 50% solution for your Toyota, to provide protection down to about -35_C (-31_F). When it is extremely cold, to provide protection down to about -50_C (-58_F), 60% solution is recommended. Do not use more than 70% solution for better coolant performance. NOTICE Do not use alcohol type antifreeze or plain water alone. CAUTION To prevent burning yourself, do not remove the radiator cap when the traction motor is hot. 182